Electromagnetic wave transparency of X mode in strongly magnetized plasma

Abstract An electromagnetic (EM) pulse falling on a plasma medium from vacuum can either reflect, get absorbed or propagate inside the plasma depending on whether it is overdense or underdense. In a magnetized plasma, however, there are usually several pass and stop bands for the EM wave depending o...

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Autores principales:	Devshree Mandal, Ayushi Vashistha, Amita Das
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/554e976aad574ea9b7e45d0c362aea89
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spelling	oai:doaj.org-article:554e976aad574ea9b7e45d0c362aea892021-12-02T16:26:38ZElectromagnetic wave transparency of X mode in strongly magnetized plasma10.1038/s41598-021-94029-32045-2322https://doaj.org/article/554e976aad574ea9b7e45d0c362aea892021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-94029-3https://doaj.org/toc/2045-2322Abstract An electromagnetic (EM) pulse falling on a plasma medium from vacuum can either reflect, get absorbed or propagate inside the plasma depending on whether it is overdense or underdense. In a magnetized plasma, however, there are usually several pass and stop bands for the EM wave depending on the orientation of the magnetic field with respect to the propagation direction. The EM wave while propagating in a plasma can also excite electrostatic disturbances in the plasma. In this work Particle-In-Cell simulations have been carried out to illustrate the complete transparency of the EM wave propagation inside a strongly magnetized plasma. The external magnetic field is chosen to be perpendicular to both the wave propagation direction and the electric field of the EM wave, which is the X mode configuration. Despite the presence of charged electron and ion species the plasma medium behaves like a vacuum. The observation is understood with the help of particle drifts. It is shown that though the two particle species move under the influence of EM fields their motion does not lead to any charge or current source to alter the dispersion relation of the EM wave propagating in the medium. Furthermore, it is also shown that the stop band for EM wave in this regime shrinks to a zero width as both the resonance and cut-off points approach each other. Thus, transparency to the EM radiation in such a strongly magnetized case appears to be a norm.Devshree MandalAyushi VashisthaAmita DasNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Devshree Mandal Ayushi Vashistha Amita Das Electromagnetic wave transparency of X mode in strongly magnetized plasma
description	Abstract An electromagnetic (EM) pulse falling on a plasma medium from vacuum can either reflect, get absorbed or propagate inside the plasma depending on whether it is overdense or underdense. In a magnetized plasma, however, there are usually several pass and stop bands for the EM wave depending on the orientation of the magnetic field with respect to the propagation direction. The EM wave while propagating in a plasma can also excite electrostatic disturbances in the plasma. In this work Particle-In-Cell simulations have been carried out to illustrate the complete transparency of the EM wave propagation inside a strongly magnetized plasma. The external magnetic field is chosen to be perpendicular to both the wave propagation direction and the electric field of the EM wave, which is the X mode configuration. Despite the presence of charged electron and ion species the plasma medium behaves like a vacuum. The observation is understood with the help of particle drifts. It is shown that though the two particle species move under the influence of EM fields their motion does not lead to any charge or current source to alter the dispersion relation of the EM wave propagating in the medium. Furthermore, it is also shown that the stop band for EM wave in this regime shrinks to a zero width as both the resonance and cut-off points approach each other. Thus, transparency to the EM radiation in such a strongly magnetized case appears to be a norm.
format	article
author	Devshree Mandal Ayushi Vashistha Amita Das
author_facet	Devshree Mandal Ayushi Vashistha Amita Das
author_sort	Devshree Mandal
title	Electromagnetic wave transparency of X mode in strongly magnetized plasma
title_short	Electromagnetic wave transparency of X mode in strongly magnetized plasma
title_full	Electromagnetic wave transparency of X mode in strongly magnetized plasma
title_fullStr	Electromagnetic wave transparency of X mode in strongly magnetized plasma
title_full_unstemmed	Electromagnetic wave transparency of X mode in strongly magnetized plasma
title_sort	electromagnetic wave transparency of x mode in strongly magnetized plasma
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/554e976aad574ea9b7e45d0c362aea89
work_keys_str_mv	AT devshreemandal electromagneticwavetransparencyofxmodeinstronglymagnetizedplasma AT ayushivashistha electromagneticwavetransparencyofxmodeinstronglymagnetizedplasma AT amitadas electromagneticwavetransparencyofxmodeinstronglymagnetizedplasma
_version_	1718383991431626752

Electromagnetic wave transparency of X mode in strongly magnetized plasma

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